They were pointing out what it is made for.
People do use them. I bought one and it failed within three months so I will not recommend them. I vote Herpstat now 100%. I have 4 units and have yet to have an issue. I suggest buying the best tstat you can. If $100-130 is to much check around for a used one. I think I even saw one here recently, check. The tstat is the most important item you will buy for your snake so don't be cheap because your snakes life depends on it.